In elimination, two groups on adjacent carbon atoms are lost and an olefine (alkene) is formed.    From Wordnik.com.  [Press Release: The 1994 Nobel Prize in Chemistry] Reference

There are three kinds of petroleum in use, namely those yielding on distillation: 1st, paraffin; 2nd, asphalt; 3rd, olefine.    From Wordnik.com.  [Steam, Its Generation and Use] Reference

For this reason a larger quantity of KOH is necessary for a given reaction (formation of olefine from alkyl bromide) than in case of the iodine compound.    From Wordnik.com.  [Transactions of the American Philosophical Society] Reference

The tendency to undergo oxidation to carbon dioxide on the part of carbon monoxide, and the absence of such tendency on the part of the defines when exposed to oxidizing influences at a temperature of 100® or below, serves as a most important criterion for the purpose of distinguishing between CO and the olefine group.    From Wordnik.com.  [Transactions of the American Philosophical Society] Reference